title: Dental and skeletal outcomes for Class II surgical-orthodontic treatment: A comparison between novice and experienced clinicians.
abstract: BACKGROUND
  The information that details dental changes accompanying presurgical and postsurgical orthodontic treatment during orthognathic surgery treatment is disappointing and results in less than ideal surgical change, but it is largely derived from university clinic samples with patients treated by residents (clinical novices). In this study, we examined similar treatments performed by experienced practitioners and compared them with the novices' results.
  
  
  METHODS
  A sample of 72 Class II subjects treated by practitioners with a mean of 26.7 years of experience was selected. Inclusion criteria were consecutively treated surgical-orthodontic patients with mandibular advancement, rigid fixation, and good-quality lateral cephalograms. Pretreatment skeletal and dental variables were compared with those from a sample treated by novices in a previous study. Presurgical and final analyses were performed with analysis of covariance (ANCOVA), with pretreatment values as the covariate. An efficacy analyses for treatment phase and study comparisons was the final component.
  
  
  RESULTS
  The novices treated patients with significantly more severe Class II skeletal problems. For both studies, there were significant positive changes in the position of the mandible. The ANCOVA analysis showed that the experienced practitioners managed the bodily position of the maxillary incisors more effectively. The efficacy analysis showed no statistically significant differences between novices and experienced practitioners. For both novices and experienced practitioners, according to the ANB changes, nonideal incisor decompensation led to less than ideal final mandibular positions.
  
  
  CONCLUSIONS
  The dental and skeletal mean changes and efficacy analysis for both novices and experienced practitioners showed that presurgical orthodontic treatment often does not fully decompensate the incisors; this then limits the surgical outcome.
authors.affiliation: Division of Orthodontics, College of Dentistry, Ohio State University, Columbus, USA.
authors.forename: Brittany
authors.initials: B
authors.lastname: Potts
authors.forename: Henry W
authors.initials: HW
authors.lastname: Fields
authors.forename: Shiva
authors.initials: S
authors.lastname: Shanker
authors.forename: Katherine W L
authors.initials: KW
authors.lastname: Vig
authors.forename: F Michael
authors.initials: FM
authors.lastname: Beck
mesh_terms: D002508:Cephalometry / Q000379:methods; D002983:Clinical Competence; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007180:Incisor / Q000473:pathology; D007396:Internship and Residency; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology / Q000601:surgery* / Q000628:therapy; D008334:Mandible / Q000473:pathology; D019186:Mandibular Advancement; D008437:Maxilla / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D009970:Orthodontics / Q000145:classification / Q000193:education; D009971:Orthodontics, Corrective; D056948:Orthognathic Surgical Procedures; D009984:Orthopedic Fixation Devices; D012658:Sella Turcica / Q000473:pathology; D016896:Treatment Outcome; D014716:Vertical Dimension